Fuel, Brake and Trans Cooler lines replacement questions

[msg]

I am planning to replace the lines as I rebuild and there are some questions I have on the types and sizes of the lines to use.

Types to use?
Stainless steel was the first thought but others have suggested Nickel/Copper instead. Is this type of line ok for all 3 needs that I have, or is stainless steel better for fuel and transmission fluid?

Bend or buy pre bent?
I have a bending tool and thought to buy the right types and sizes of lines in a coil and shape them as I need to. I have the old lines to match up but I am putting in a L31 engine vs the old 350 from 1975 that was in there thats not in good shape. Because of the new engine and running an electric fuel pump there will be differences Ill have to figure out, but I was thinking to buy in coil format and size things up as I go.

Sizes for each line that I need
Is the measurement supposed to be outer or inner diameter?

Brake Lines
Ive been measuring the Brake lines and from the master cylinder to the front discs are measuring outer diameter .250 in on the caliper tool but the lines to the rear drums are reading .206 in.

Fuel line
The measurement I have on the old fuel line is .3245 in

Trans line
The measurement I have on the old trans line is .3195 in